Finding the Fourth Proportional to 115,201.75, 158,978.42 and 64,900.75

Step by Step Solution

1. Step 1: Write the proportion equation
   115,201.75 : 158,978.42 = 64,900.75 : x
2. Step 2: Convert to fraction form
   115,201.75/158,978.42 = 64,900.75/x
3. Step 3: Cross multiply
   115,201.75x = 158,978.42 × 64,900.75
4. Step 4: Simplify right side
   115,201.75x = 10,317,818,691.82
5. Step 5: Solve for x
   x = 10,317,818,691.82/115,201.75
6. Step 6: Final answer
   x = 89,563.04